Add Github Copilot setup steps for SQL Server

Author: roji

.github/copilot-instructions.md

@@ -89,6 +89,7 @@ If you are not sure, do not guess, just tell that you don't know or ask clarifyi
 - Create both unit tests and functional tests where appropriate
 - Fix `SQL` and `C#` baselines for tests when necessary by setting the `EF_TEST_REWRITE_BASELINES` env var to `1`
 - Run tests with project rebuilding enabled (don't use `--no-build`) to ensure code changes are picked up
+- When adding a new query-related test, always override it in the SQL Server provider and use AssertSql to verify the generated SQL is as expected.
 
 #### Environment Setup
 - **ALWAYS** run `restore.cmd` (Windows) or `. ./restore.sh` (Linux/Mac) first to restore dependencies

.github/workflows/copilot-setup-steps.yml

@@ -0,0 +1,79 @@
+name: "Copilot Setup Steps"
+
+# Based on https://docs.github.com/en/copilot/how-tos/use-copilot-agents/coding-agent/customize-the-agent-environment
+
+# Automatically run the setup steps when they are changed to allow for easy validation, and
+# allow manual testing through the repository's "Actions" tab
+on:
+  workflow_dispatch:
+  push:
+    paths:
+      - .github/workflows/copilot-setup-steps.yml
+  pull_request:
+    paths:
+      - .github/workflows/copilot-setup-steps.yml
+
+jobs:
+  # The job MUST be called `copilot-setup-steps` or it will not be picked up by Copilot.
+  copilot-setup-steps:
+    runs-on: ubuntu-latest
+
+    # env:
+    #   MSSQL_IMAGE: mcr.microsoft.com/mssql/server:2025-latest
+
+    # Install SQL Server via a docker container.
+    # It's better to do this rather than e.g. use a testcontainer, because then the agent can reuse the same container
+    # and instance of SQL Server rather than have to start it up each time it needs to iterate and run a test.
+    services:
+      mssql:
+        image: mcr.microsoft.com/mssql/server:2025-latest
+        env:
+          ACCEPT_EULA: "Y"
+          SA_PASSWORD: ${{ secrets.MSSQL_SA_PASSWORD }}
+        ports:
+          - 1433:1433
+        options: >-
+          --health-cmd="/opt/mssql-tools/bin/sqlcmd -S localhost -U sa -P ${{ secrets.MSSQL_SA_PASSWORD }} -Q 'SELECT 1'"
+          --health-interval=2s
+          --health-retries=30
+          --health-timeout=5s
+
+#    permissions:
+#      contents: read
+
+    # You can define any steps you want, and they will run before the agent starts.
+    # If you do not check out your code, Copilot will do this for you.
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+
+      - name: Restore
+        run: ./restore.sh
+
+      # - name: Setup .NET Core SDK
+      #   uses: actions/setup-dotnet@v5
+
+      # Install SQL Server via a docker container.
+      # It's better to do this rather than e.g. use a testcontainer, because then the agent can reuse the same container
+      # and instance of SQL Server rather than have to start it up each time it needs to iterate and run a test.
+      # - name: Start SQL Server container
+      #   run: |
+      #     docker pull "$MSSQL_IMAGE"
+      #     docker run --name mssql -e ACCEPT_EULA=Y -e "SA_PASSWORD=${SA_PASSWORD}" -p 1433:1433 -d "$MSSQL_IMAGE"
+
+      # - name: Wait for SQL Server to be ready
+      #   shell: bash
+      #   run: |
+      #     # Simple wait loop; the container typically needs ~10-20s
+      #     for i in {1..60}; do
+      #       if docker exec mssql /opt/mssql-tools/bin/sqlcmd \
+      #           -S localhost -U sa -P "${{ secrets.MSSQL_SA_PASSWORD }}" \
+      #           -Q "SELECT 1" &>/dev/null; then
+      #         echo "SQL Server is up"
+      #         break
+      #       fi
+      #       echo "Waiting for SQL Server..." && sleep 1
+      #     done
+
+      - name: Export SQL Server connection string for the agent's session
+        run: echo "Test__SqlServer__DefaultConnection=Server=localhost;Database=admin;User=SA;Password=${{ secrets.MSSQL_SA_PASSWORD }};Connect Timeout=60;ConnectRetryCount=0;Trust Server Certificate=true" >> "$GITHUB_ENV"

EFCore.slnx

@@ -1,7 +1,6 @@
 <Solution>
   <Folder Name="/Solution Items/">
     <File Path=".editorconfig" />
-    <File Path=".github/copilot-instructions.md" />
     <File Path="azure-pipelines-internal-tests.yml" />
     <File Path="azure-pipelines-public.yml" />
     <File Path="azure-pipelines.yml" />
@@ -13,6 +12,14 @@
     <File Path="NuGet.config" />
     <File Path="tools/Resources.tt" />
   </Folder>
+  <Folder Name="/.github/">
+    <File Path=".github/copilot-instructions.md" />
+  </Folder>
+  <Folder Name="/.github/workflows/">
+    <File Path=".github/workflows/copilot-setup-steps.yml" />
+    <File Path=".github/workflows/inter-branch-merge-flow.yml" />
+    <File Path=".github/workflows/TestCosmos.yaml" />
+  </Folder>
   <Folder Name="/src/">
     <File Path="src/Directory.Build.props" />
     <Project Path="src/dotnet-ef/dotnet-ef.csproj" />